Blanket for printing-press cylinders.



N. J. & E. J.- GAUYHEER.

BLANKET FOR PRINTING PRESS CYLHJDERS.

'APPUCATIOH FILED JUNE}. 1914.

1, 1&5 1L Patented May 25, m5.

' 'NQEHAN 3?. EhUTEEGEE, GE BERWYFI,

' material ,f'ltste of Illinois, respectively,

.or grease, as,

superposed layer of felt, or the l1ke,the'

sandman snares ora on AND Ffizl-WK 3. GeelJ'THIEB, 01* CHICAGQ, ILLINOIS.

BLANKET FQB YEINTINGPEESS CYLINDERS.

i stoma.

ltpecll'leation of Letters Iatent.

Patented May 25, 1915.

Application filed July 3, 191%. Seriabilo. 548,707.

T all whom it may concern Be it known that we, NonMAN J. GAU- Tnmn and FRANK Ll. 'Gao'rrnnn, citizens of the United States, residing at Bcrwyn, in the county of Cook and State of Illinois and at Chicago, in the county of Cook and a new and useful Improvement in Blankets for Printing-Press Cylinders, of which the following is a specification.

it is common practice to provide certain of the cylinders of printing presses which oppose the cylinders carrying the type, with a cushioning surface formed in part oft a layer of cushioning material of a character subject to impairment by contact with oil, for example, rubber, with a paper to be printed passing between the printing and cushioning cylinders.

The cushioning means referred to and commonly termed a blanket, as hitherto constructed, has presented the serious objection of permitting ink, and lubricating oils supplied to the bearings of the press, to penetrate through the layer covering the said layer of cushioning material, and work its wa y into the layers of the blanket at the ends of the cylinder, the ink and grease in contacting with the said layer of cushionin causing it to deteriorate 'an blister. and in some cases the particles of ink massing together on the layer of cushioning material, theresult being in all of those cases that the blanket becomes so impaired that it ceases to present the proper uniform cushioning surface required for the making of the proper impressions on the paper to be printed. The disintegration of the said. layer of cushioning material by the action of the oils and ink is such that it is soon rendered unfit for use and requires replacement. with consequent interruption to the operation of the press, with relatively great expense. I i

, Our object is to provide a blanket for a printing-press cylinder which will not be subject to impairment as stated, permitting press cylinder,

used throughout its natural life.

' the cylinder; and

have invented opposite edges of-the Fig. 3, a view showing a ortion of the cylinder in section with our improved blanket ap lied thereto, the end of the blanket being 5 iown mainly in elevatlon.

The cylinder illustrated is of the type known as a double width cylinder used in a press for-printing two pages of a newspaper at one operation, though our improved blanket may be used in connection with a single width cylinder, as will be hereinafter explained.

In carrying out our invention, we pro- 'vide a protecting medium for the layer of cushioning material, as, for example, rubher, or rubber composition, provided in sheet form, of a character which is'impervious to ink, oil and grease, positioned over turning them, are journaled, these reels be-' ing provided with longitudinally extending grooves 7, cotiperating with clamping bars 8 for clamping the free edges of the outermost covering of the blanket to hold the'layers thereof, after being wrapped about the cylinder, in proper position thereon.

The form of blanket illustrated comprises a strip of fabric 9, as, forexample, ,duck, coated with a layer 10 of cushioning material, such as soft rubber or rubber composition, a superposed layer of felt 11 and an outer covering of muslin 12, with aprotecting envelop 13 for the layer 10, formed of a material which is impervious to oil, grease, and ink, and suiiiciently pliable not to'interfcre with the cushioning action of the layer 10, the material which we prcfer to use being formed-of comparatively thin sheets of zinc, preferably about six thousendths of an inch in thickness, the envelop 13 extending over the layer 10 and underneath the backing 9, and closed at the ends extend longitudinallywe prefer to form the protectin covering 13 by using two sheets of materia and folding them into the form shown to receive the layers 9 and 10, the edges of the sheets thus folded either meeting, or spaced a slight distance apart intertach to the covering mediate the ends of the cylinder as illu trated at 14 The" covering 13 for the layer '10 will thus extend over the latter practically throughout the extent of this layer and will pass around the edges of the layers 9 and 10 at the ends of the cylinder, thus preventing ink which may penetrate throughthe felt layer l1, or grease which may attack the blanket at the ends ofa'the cylinder, from comingin contact with the layer '10.

As is usual practice, one end of the blanket '18 inserted into the recess 4 and hooked atv apertures 15 therein over pins 16 in the recess, the muslin-strip at this, end of the blanket being clamped in the groove 7 in the reel 6, by the bar 8, and a portion of the covering 12 wrapped about the reel 6 by rotating it, both the reels 5 and 6 in practice being provided with ratchet means preventing them from turning backwardly. The blanket is then Wrapped around the cylinder and the free end ofthe blanket tucked into the recess 4 with the end of the strip 12 at this end of the blanket, clamped to the reel 5 as described of the other end of the covering 12, and upon rotating the reel 5 drawn in taut condition over the underlying layers of the blanket, thus serving to hold the blanket inproper position on the cylinder of which Where the.

it forms the cushioning surface. cylinder to be provided With a blanket is what is known as a single width cylinder, it is desi able that the protecting strip extendin over the layer 10 be continuous from end to end of the blanket, and, in practice, we prefer to form this protecting covering of a sheet of material of such- Width that it may be folded upon itself as explained of the sections forming the covering 13 and extend entirely across the blanket, the free edges of the covering 13 being soldered to seal this end of the protecting'coveririg 13.

It is preferred, in practice, to firmly at- 13 the portion of the blanket which is located therebetween, and this may be done by using any suitable adhesive.

It will be understood from the foregoing that the layer 10 of cushioning material will be thoroughly protected against access thereto of deleterious substances, by means which will not impair the eilicicncv of the blanket as a suitable cusl'iioning, medium.

Another advantage which results from the use of our invention is that a much lower grade of rubber, when used either above, or

form

1 modified and particular embodiment of our invention, We do not Wish to be understood as intending to limit it thereto as the same may be variously altered without departing from the spirit of our invention. w

lVhat we claim as new and desire to secure by Letters Patent is 1; A blanket for a printing-press cylinder formed With a layer of cushioning material subject to impairment by contact with oil, or grease, with impervious sheet material of a character not subject to the deleterious action of oil'or grease superposed on the 011511? ioning layer and incasing the edges thereof at the ends of the cylinder, for the purpose set forth.

2. A blanketfor a printing-press cylinder formed with a layer of cushioning material subject to impairmentby contact With oil, or grease, with impervious sheet material of a character not subject to the deleterious action of oil or grease incasing said cushioning layer against contact with deleterious substances contacting with "the blanket at its circumference or at its end.

3. A blanket for a printing-press cylinder formed with a layer of cushioning material subject to impairment by contact with oil, or grease, with sheet-material of a character not subject to the deleterious action of oil or grease extending entirely, or substantially entirely, over both surfaces of said cushioning layer and incasing the latter at the ends of the cylinder, for the purpose set forth.

4-. A. blanket for aprinting-press cylinderiormed With a layer of cushioning material subject to impairment by contact With oil, or grease, with pliable sheet-metal superposed on said cushioning layer and protect in; it against the action of deleterious substances contacting with the blanket.

5. A blanket for a printingpress cylinder formed with a layer of cushioning material subject to impairment by contact with oil, or grease, with pliable sheet-metal superposed. on said cushioning layer and'incasing the edges thereof at the ends of the cylinder, for. the purpose set forth.

6. A blanket for a printindpress cylinder formed Witha layer of cushioning material subject to impairment by contact with oil, or grease, with folded sheetsof imperviousmaterial iuulcrlying, and overlying said cushioning layer at its opposite edges, with the folded edges of the sheets lying at the edges of said cushioning layer at the ends ofthe cylinder, for the purpose set forth.

NORMAN J. GAUTHIER. FRANK J. GAUTHIER. In presence of -WILLIAM B. DAvIEs, CATHARINE B, JAcoBs. 

